Its main features include: (1) high selectivity, high resolution spectral technique, which is free from the interference of other gases due to the "fingerprint" of the molecular spectrum. This characteristic has obvious advantages compared with other methods. (2) it is a general technique for the efficient use of all active molecules that are absorbed in the infrared, and the same apparatus can be easily converted into an instrument for the measurement of other components. Because of this feature, it is easy to change it into a simultaneous measurement of multiple components.(3) it has the advantages of high speed and high sensitivity. In the absence of sensitivity, the time resolution can be in the order of MS. The main field of application of this technology are: molecular spectroscopy, industrial process monitoring and control, combustion diagnosis analysis, the efficiency of t...

That is, the distributed feedback laser, which is different from the built-in Prague Grating (Bragg), is a side emitting semiconductor laser. At present, DFB laser is mainly based on semiconductor materials, including InP (GaSb), gallium arsenide (GaAs), indium phosphide (INP), zinc sulfide (ZnS) and so on. The biggest characteristic of DFB laser has very good monochromaticity (i.e., the width of spectral purity) it generally can do less than 1MHz, and has very high side mode suppression ratio (SMSR), the current can reach up to 40-50dB....

As an important tool in semiconductor manufacturing, lasers are also used in the manufacture of other products, from a razor blade to the jet engine manufacturing plays an important role; like IPG Photonics (IPGP) and Newport (NEWP) of these companies have seen the industry growth point. The small size and low cost make it easier to be a part of a precision tool, replacing the old processing technology in factories and research laboratories. NEWP CEO Bob Phillippy pointed out that the mechanical tools can not be completed, can be done by laser." Laser is not only used for cutting and welding. They are also used in scientific instruments, such as those that produce cell membrane images. From military to civilian Phillippy pointed out that the military has long been the use of laser targeting and monitoring; applications in these areas can be extended to civilia...